Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7c2f5ea8226b0b2…

MALICIOUS

PDF

67.3 KB Created: 2021-09-16 01:54:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 04e6685e2b1f23dcc1af52de71018168 SHA-1: 51b72f9bd719e9f878771646a96ccf4b8eb08139 SHA-256: f7c2f5ea8226b0b2492d3e92288bb117208acce0016f6098dc9178ddaeef1fe0
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample is a PDF file flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains numerous embedded URLs pointing to various domains, suggesting a link farm or phishing lure. The PDF structure and embedded content indicate it is designed to redirect users to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8890

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://philabc.ru/uplcv?utm_term=friv+2+new+games PDF link annotation
    • http://j-club.eu/userfiles/file/37490588814.pdfIn PDF document text
    • http://ecosdaliberdade.com/ckfinder/userfiles/files/jeter.pdfIn PDF document text
    • http://2ds-creations.fr/userfiles/file/29951185452.pdfIn PDF document text
    • http://chothuethietbi.info/img/files/vodimugimese.pdfIn PDF document text
    • http://oshcongregation.com/userfiles/file/sojoxajoluwivumawiturok.pdfIn PDF document text
    • https://aynispirit.nl/userfiles/file/38630111208.pdfIn PDF document text
    • http://duda-tech.pl/dudatech/upload/file/xomubojubi.pdfIn PDF document text
    • https://luxm.pl/userfiles/file/5050741563.pdfIn PDF document text
    • http://sparan-art.ru/ckfinder/userfiles/files/50041285363.pdfIn PDF document text
    • http://bodemveenweiden.nl/bodem-veenweiden-img/dutobujezoxoj.pdfIn PDF document text
    • http://permanentnimakeup-brno.cz/userfiles/files/lanezotupifalarido.pdfIn PDF document text
    • http://tonwen.org/userfiles/file/bozirovulupixumudelatunos.pdfIn PDF document text
    • https://sanipro.ma/app/webroot/uploaderfiles/wimetuluxedujoteti.pdfIn PDF document text
    • http://foreverymuslim.net/home1/forevev3/public_html/foreverymuslim/upload/file/65684674314.pdfIn PDF document text
    • http://parejalecaros.com/adjunto/upload/fck/files/61784941312.pdfIn PDF document text
    • http://goodlife88.com/uploads/files/begejixunemazabamebawaka.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613d736b8a991---11667452397.pdfIn PDF document text
    • http://2018.letnifestiwal.pl/ckfinder/userfiles/files/nakem.pdfIn PDF document text
    • http://heatexchangersolution.com/upload_fck/file/2021-9-16/20210916050731523131.pdfIn PDF document text
    • http://nitecoreromania.ro/files/file/52454374308.pdfIn PDF document text
    • https://o-dance.com/upload/files/17426539727.pdfIn PDF document text
    • http://wonsakai.com/uploads/files/85193850656.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c790.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC790 17188 bytes
SHA-256: 1446532d60c29b32bee90981be5fe0f81bf1d4234e7e2778c29e5ff8b2c47cb7
font_01_sfnt_off0000f407.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF407 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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